Portable 4D Snapshot Hyperspectral Imager for Fastspectral and Surface Morphology Measurements

被引：0
作者：
Luo J. [1 ]
Lin Z. [1 ]
Xing Y. [1 ]
Forsberg E. [1 ]
Wu C. [1 ]
Zhu X. [2 ]
Guo T. [1 ]
Wang G. [1 ]
Bian B. [3 ]
Wu D. [4 ]
He S. [1 ]
机构：
[1] Centre for Optical and Electromagnetic Research, National Engineering Research Center for Optical Instruments, Zhejiang Provincial Key Laboratory for Sensing Technologies, College of Optical Science and Engineering, Zhejiang University, Hangzhou
[2] Taizhou Agility Smart Technologies Co., Ltd, Taizhou
[3] Ningbo Electric Power Company, State Grid Corporation, Ningbo
[4] PopSmart Technology Co., Ltd, Ningbo
来源：
Progress in Electromagnetics Research | 2022年 / 173卷
基金：
中国国家自然科学基金;
关键词：
Cameras - Liquid crystals - Morphology - Cost effectiveness - Surface morphology - Spectroscopy;
D O I：
10.2528/PIER22021702
中图分类号：
学科分类号：
摘要：
A portable 4D snapshot hyperspectral imager (P4DS imager) with compact size, fast imaging time, low cost, and simple design is proposed and demonstrated. The key components of the system are a projector, a liquid crystal tunable filter (LCTF), and a camera. It has two operating modes depending on the set state of the LCTF: a 3D light measurement mode that produces a 3D point cloud reconstruction of an object and a hyperspectral imaging mode yielding spectral data. The camera imaging plane is the same for both operating modes allowing the collected spatial and spectral data to be directly fused into a 4D data set without post-processing. The P4DS imager has excellent performance with a spectral resolution of 10 nm, a spatial depth accuracy of 55.7 µm, and a total 4D imaging time of 0.8 s. 4D imaging experiments of three different samples, namely, a colored figurine, green broccoli, and a human face, are presented to demonstrate the efficiency and applicability of the system. Due to being cost-effective, portable, and good imaging performance, the proposed system is suitable for commercialization and mass production. © 2022, Electromagnetics Academy. All rights reserved.
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页码：25 / 36
页数：11
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